Rehabilitation aid



FIG. 1 is a perspective view of a rehabilitation aid, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof; and,

FIG. 4 is a left-side elevational view thereof, the right-side elevational view, top plan view, and bottom plan view all being a mirror image thereof.

The broken lines showing a wall to which the design is mounted in FIG. 1 depict environmental matter and form no part of the claimed design. 

I claim the ornamental design for a rehabilitation aid, as shown and described. 